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AssigneeSyncro S.R.L.
InventorsGabriele CACCIA, Paolo RIZZOTTI, Enrico NAPPA
Estimating the term…
A device arranged in the cooling ring of an apparatus for the production of blown films in order to adjust the thickness profile thereof is disclosed. The device includes a plurality of equally spaced motor-driven actuators that adjust the flow rate of the flow of a cooling fluid directed towards a forming cone, as well as a plurality of equally spaced resistances provided with finned dissipators arranged in the path of the cooling flow. In this way, the device combines the characteristics of low power consumption and high adjustment velocity of a volumetric device with the higher angular resolution achievable through the heating elements of a thermal device, and all of this with an operating method that prevents the risks of bubble instability or adhesion, achieves a high energy efficiency and guarantees a wide thickness adjustment range.
Device arranged in the cooling ring of an apparatus for the production of blown films in order to adjust the thickness profile of said films, said device comprising a plurality of actuators equally spaced around said ring and arranged in adjustment chambers where they adjust the flow rate of the flow of a cooling fluid directed towards a forming cone, as well as a plurality of heating elements equally spaced around the ring and arranged in said adjustment chambers, wherein said actuators and said heating elements are sequentially arranged in the path of the cooling flow through the adjustment chambers.
Method for the adjustment of the thickness profile of blown films at the cooling ring of an apparatus for the production of blown films, comprising:
Dependencies are inferred from the claim text.